CN103233458A - Expansive soil improved by waste straw ash and marble ash and preparation method and application thereof in construction - Google Patents

Expansive soil improved by waste straw ash and marble ash and preparation method and application thereof in construction Download PDF

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CN103233458A
CN103233458A CN2013101544747A CN201310154474A CN103233458A CN 103233458 A CN103233458 A CN 103233458A CN 2013101544747 A CN2013101544747 A CN 2013101544747A CN 201310154474 A CN201310154474 A CN 201310154474A CN 103233458 A CN103233458 A CN 103233458A
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soil
albarium
ash
improvement
stalk ash
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CN103233458B (en
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张德恒
孙树林
王成
程亚男
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Hohai University HHU
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Hohai University HHU
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Abstract

The invention discloses expansive soil improved by waste straw ash and marble ash and a preparation method and an application thereof in construction and belongs to the technical field of geological disaster treatment and geotechnical engineering. The preparation method includes the following steps: 1 weighing straw ash, marble ash and dry soil of a soil body needing improving according by mass percent and evenly mixing; 2 determining the optimum moisture content of mixed soil; 3 adding water into the mixed soil obtained in step 1, evenly stirring the mixture and covering the soil in a wet mode to obtain the improved soil. The application of the improved soil in the construction includes laying the obtained improved soil on a construction face to form a surface improved layer, statically pressing the surface improved layer through a light packer, covering a plastic film to conduct enclosed maintenance, conducting vibrating grinding, conducting plastic film covering maintenance, conducting static pressing through a heavy packer and conducting fine flattening to achieve the strength required by a project. By means of the expansive soil, the preparation method and the application, the damage problem caused by expansion and contraction of the expansive soil and the environment pollution problem caused by wastes can be effectively solved.

Description

With expansive soil of discarding the improvement of stalk ash and albarium and preparation method thereof and the application in construction
Technical field
The invention belongs to geological disaster processing and geotechnical engineering technical field.Be particularly related to expansive soil of discarding the improvement of stalk ash and albarium and preparation method thereof and the application in construction.
Technical background
Expansive soil is stronger to the sensitiveness of water, has the advantages that the water-swellable dehydration is shunk.There are very big potential safety hazard in light-duty structure on expansive soil foundation such as road, railway, hydraulic engineering, so must handle expansive soil before construction.
Expansive soil distributes comparatively extensive in China, China is that world's expansive soil distribution is the widest, one of country of area maximum, a provinces surplus the area of expansive soil harm has reached 20.The engineering problem that expansive soil brings has seriously hindered the development of local economy, so the improvement expansive soil becomes the technical barrier that needs to be resolved hurrily so that the disaster that it brings disappears or reduces.
Have at the method with additive improvement expansive soil at present: mix quicklime, cement, flyash or lime-mixture of fly ash etc. mainly are chemical modifyings.It is the most general wherein to add lime or lime-flyash, and the lime main component is calcium oxide, plays ion-exchange, flocculation, carbonization and cementation in the improvement expansive soil.Stalk ash is from biomass fermentation power plant, based on burning straw.Biomass ash is the cinder slag and thin ash, and wherein thin ash is that a kind of good raw material of producing chemical fertilizer directly is sent to chemical fertilizer factory, so and the cinder slag should not pulverize and nobody shows any interest in.Up to the present the cinder slag mainly is landfilled or directly as the road filling material etc., because the cinder slag is that the coarse aggregate cohesiveness is less, water stability is relatively poor, directly as high-grade roadbed filling poor durability.Albarium is from quarry, area, Nanjing and cutting marble factory or its polishing plant, main component is calcium oxide, silica, di-iron trioxide and alumina etc., these all are good cementitious material, cohesiveness is big conveniently to be obtained, can remedy the deficiency of stalk ash, so can be made into effective curing compound by a certain percentage with these two kinds solid refuses.The stalk ash wide material sources, the 1 year stalk output in the whole nation is 900,000,000 tons according to investigations, has at least every year half to be wasted.The source of drawing material that this shows these two kinds of discarded objects is very convenient, and cheap, and very big development and application space is arranged.
Compare with other modifying agents, " two ashes " (stalk ash and albarium) has better economic benefit and social benefit, cost is very cheap, and these two kinds of discarded objects according to a certain ratio directly the blending just can put in the middle of the engineering, for the recycling of " two ashes " has been created new approaches.Therefore, " two ashes " to administering the expansive soil disease, improves the High-Grade Highway Subgrade workmanship as the new material of improveing expansive soil, reduces engineering cost, and protection environmental construction close friend type society has very important academic values, social value.
Utilize solid refuse improvement expansive soil to be subjected to extensive concern at present, popularizing application prospect enjoys favor because it has widely.Chinese patent CN101423353B, the method for improving expansive soil by waste foundry sand and job practices, this patent have taken into full account expansion characteristics, improved intensity and resource circulation utilization, but still have the following disadvantages: 1. intensity improves less; 2. the intensity durability research after improveing; 3. fully do not provide concrete job practices.Chinese patent CN102352622A, method and the job practices of alkaline residue improvement expansive soil, this patent is obtaining great success aspect the improvement expansive soil, but still has the following disadvantages: 1. admittedly refuse to obtain approach narrow; 2. alkaline residue large usage quantity; 3. the intensity durability research after not improveing.Chinese patent CN102249581A, method and the job practices of carbide slag improvement expansive soil, this patent have been considered to reduce expansive soil characteristic and the environmental protection of expansive soil, but still have the following disadvantages: the durability characteristics that does not 1. provide improvement back filler; 2. do not provide the strength characteristic after the improvement; 3. modifying agent content is lower, brings certain difficulty can for concrete construction.
In order to overcome these deficiencies, the present invention improves expansive soil with discarded stalk ash and albarium, the source of these two kinds solid refuses is wide, enormous amount, after carried out expansion characteristics and the strength test of improvement back expansive soil, and provided intensity durable change feature and concrete work progress.
Summary of the invention
The technical problem that solves is: the present invention overcomes the deficiencies in the prior art and proposes expansive soil and preparation method thereof and the application in construction with discarded stalk ash and albarium improvement, can effectively solve the destruction that the swell-shrinking deformation of expansive soil brings and ask
The problem of environmental pollution that topic and discarded object bring.
Technical scheme: :The preparation method who discards the expansive soil of stalk ash and albarium improvement according to usefulness of the present invention is:
The first step takes by weighing 10% stalk ash by mass percentage, 10% ~ 20% albarium, and the dry ground of 70% ~ 80% the required improvement soil body mixes; The analysis result of described stalk ash is, in the mass percent of the oxide that obtains after the analyzing and testing: silica 60% ~ 61%, calcium oxide 23% ~ 25%, alumina 4% ~ 5%, iron oxide 2% ~ 3.3%, potassium oxide 3% ~ 5%, magnesia 2% ~ 3%, sodium oxide molybdena 0.9% ~ 1%; The analysis result of described albarium is, in the mass percent of the oxide that obtains after the analyzing and testing: calcium oxide 54.1% ~ 55.2%, carbon dioxide 40.6 ~ 41.2, silica 1 % ~ 1.7%, alumina 0.1% ~ 1.3%, iron oxide 0.8% ~ 1.2%, magnesia 0.9% ~ 1.5%.
In second step, determine that according to the medium and heavy compaction test of " highway earthwork test rule " (JTG E40-2007) optimum moisture content of composite soil is 18.6% ~ 19.7%.
The 3rd step added water in the composite soil that the first step obtains by the water content of the optimum moisture content of determining, stirred, and wet vexed 24 hours at ambient temperature, namely obtained discarded stalk ash and albarium modification soil.
Resulting conditioned soil being applied as in construction: the discarded stalk ash that will obtain and albarium improvement expansive soil are the surfaction layer of 30 ~ 50cm at the working face laying depth, through light-duty compactor static pressure → 4 ~ 7 days → vibroroller cmpacting of covered with plastic film sealing maintenance → 5 ~ 7 days → heavy compactor static pressure → essence of plastic sheeting covering curing is flat, make the composition generation chemical reaction in expansive soil and stalk ash and the albarium, eliminate or the interior swell-shrink characteristic of the reduction expansion soil body, by large-scale compactor compacting, can reach requirement of engineering intensity again.
The main component of the stalk ash among the present invention is silica, alumina and iron oxide, the main component of albarium is calcium oxide, the mechanism that both improve expansive soil comprises following aspect: oxide is met water and is formed the flocculation that high price cations such as calcium, aluminium, iron can impel clay particle, dioxide etc. can make that cohesive soil takes place to coagulate reaction and form hydrated calcium silicate and drated calcium aluminate colloid firmly after the maintenance, and colloid can effectively improve the cubic deformation of the intensity repression of swelling soil of expansive soil; And calcium oxide is met the water reaction and is formed calcium ion and can displace sodium ion and potassium ion in the middle of the clay by ion-exchange, thereby the index of plasticity that can effectively reduce expansive soil by ion exchange reduces the expansion potentiality, but wherein in calcium oxide and the soil a large amount of silicon that exist, aluminium, iron plasma panel form a large amount of binding materials as the time spent and be conducive to improve also repression of swelling of native intensity.
 
Beneficial effect:The present invention has following remarkable advantage: the first, and the present invention improves expansive soil with discarded stalk ash and albarium, and the unconfined compression strength of the expansive soil after the improvement can reach 1221.2kPa, compared with prior art significantly improves.The second, the present invention effectively combines physically improved and advantage chemical modifying: utilize stalk cinder slag to provide grain skeleton to increase the angle of internal friction of expansive soil, the frictional resistance of the face of being cut of the soil body is increased, thereby improve shear strength; Stalk ash provides silica as the gelling thing, Gu the refuse albarium provides calcium oxide to increase the cohesion of composite soil, thereby improve shear strength and the durability of the soil body, the unconfined shear strength that draws after the drying and watering cycle by the drying and watering cycle life test can reach 878.82kPa, and the 67.42kPa of pure relatively native drying and watering cycle shear strength significantly improves; The 3rd, discarded stalk cinder slag and albarium improvement expansive soil can effectively solve the environment pollution that destruction problem that the expansive soil swell-shrinking deformation brings and solid refuse bring.
 
The specific embodiment
Stalk ash of the present invention is from area, Jiangsu biomass fermentation power plant, and albarium is from quarry, area, Nanjing and cutting marble factory or its polishing plant.The chemical composition of two kinds of discarded objects is as shown in table 1.
The chemical composition analysis result of table 1 stalk ash and albarium
The preparation method who discards the expansive soil of stalk ash and albarium improvement according to usefulness of the present invention is:
The first step takes by weighing 10% stalk ash by mass percentage, 10% ~ 20% albarium, and the dry ground of 70% ~ 80% the required improvement soil body mixes; The analysis result of described stalk ash is, in the mass percent of the oxide that obtains after the analyzing and testing: silica 60% ~ 61%, calcium oxide 23% ~ 25%, alumina 4% ~ 5%, iron oxide 2% ~ 3.3%, potassium oxide 3% ~ 5%, magnesia 2% ~ 3%, sodium oxide molybdena 0.9% ~ 1%; The analysis result of described albarium is, in the mass percent of the oxide that obtains after the analyzing and testing: calcium oxide 54.1% ~ 55.2%, carbon dioxide 40.6 ~ 41.2, silica 1 % ~ 1.7%, alumina 0.1% ~ 1.3%, iron oxide 0.8% ~ 1.2%, magnesia 0.9% ~ 1.5%.
In second step, determine that according to the medium and heavy compaction test of " highway earthwork test rule " (JTG E40-2007) optimum moisture content of composite soil is 18.6% ~ 19.7%.
The 3rd step added water in the composite soil that the first step obtains by the water content of the optimum moisture content of determining, stirred, and wet vexed 24 hours at ambient temperature, namely obtained discarded stalk ash and albarium modification soil.
Resulting conditioned soil being applied as in construction: the discarded stalk ash that will obtain and albarium improvement expansive soil are the surfaction layer of 30 ~ 50cm at the working face laying depth, through light-duty compactor static pressure → 4 ~ 7 days → vibroroller cmpacting of covered with plastic film sealing maintenance → 5 ~ 7 days → heavy compactor static pressure → essence of plastic sheeting covering curing is flat, make the composition generation chemical reaction in expansive soil and stalk ash and the albarium, eliminate or the interior swell-shrink characteristic of the reduction expansion soil body, by large-scale compactor compacting, can reach requirement of engineering intensity again.
The present invention is described in further detail below in conjunction with embodiment.
Embodiment 1
With the preparation method of the expansive soil of discarding the improvement of stalk ash and albarium, step is:
The first step, preparation 1000g composite soil, stalk ash by mass percentage: albarium: expansive soil (soil sample after the oven dry is crossed the 0.5mm sieve)=10:15:75, take by weighing the dry ground quality 750g of the required improvement soil body, stalk ash 100g, albarium 150g mixes; The analysis result of described stalk ash is, in the mass percent of the oxide that obtains after the analyzing and testing: silica 61%, calcium oxide 25%, alumina 5%, iron oxide 3%, potassium oxide 3%, magnesia 2%, sodium oxide molybdena 1%; The analysis result of described albarium is, in the mass percent of the oxide that obtains after the analyzing and testing: calcium oxide 54.7%, carbon dioxide 40.9%, silica 1 %, alumina 1.3%, iron oxide 1.2%, magnesia 0.9%.
In second step, determine that according to " highway earthwork test rule " (JTG E-2007) modified compaction test the optimum moisture content of composite soil is 19.1%.
The 3rd step joined 19.1g water in the mixture of the first step, and layering adds water and stirs, and wet vexed 24 hours with plastic membrane sealing at ambient temperature, namely obtained discarded stalk ash and the modified expanded soil of albarium.
The application of gained conditioned soil in construction: the discarded stalk ash of gained and albarium modification earth mixtures laid with bulldozer to form the engineering desired thickness be the surfaction layer of 30cm, through light-duty compactor static pressure → 4 days → vibroroller cmpacting of covered with plastic film sealing maintenance → 5 days → heavy compactor static pressure → essence of plastic sheeting covering curing is flat, composition generation chemical reaction in the soil body of required improvement and discarded stalk ash and the albarium, eliminate or reduce the swell-shrink characteristic of the soil body in the improvement layer, can reach requirement of engineering intensity.
Improved effect: (1) swell-shrink characteristic: the free swell test of doing according to " highway earthwork test rule " (JTG E40-2007), the degree of free swelling of pure expansive soil is 70%, the degree of free swelling of the soil body when mixing 10% stalk ash and 15% albarium after the improvement only is 10%, the requirement of degree of free swelling Fs≤40% of the improvement expansive soil of satisfied " highway subgrade construction technique normalizing " defined; Test according to the expansion overall rate that " highway earthwork test rule " (JTG E40-2007) does, the breathing overall rate of pure expansive soil is 11.9%, the breathing overall rate of the soil body when mixing 10% stalk ash and 15% albarium after the improvement is 0.18%, the requirement of breathing overall rate eps≤0.7% of the improvement expansive soil of satisfied " highway subgrade construction technique normalizing " defined; (2) intensity: the unconfined compression strength test of doing according to " highway earthwork test rule " (JTG E40-2007), the unconfined compression strength of pure expansive soil is 550kPa, the unconfined compression strength of the soil body when mixing 10% stalk ash and 15% albarium after the improvement is 1221.2kPa, and improvement back intensity has improved 122%; After the drying and watering cycle 5 times, the unconfined compression strength of plain soil eases down to 67.42kPa from 550kPa, has reduced by 87.7%, and conditioned soil intensity is reduced to 878.82kPa, has reduced by 28.2% with respect to 1221.2 kPa.
 
Embodiment 2
With the preparation method of the expansive soil of discarding the improvement of stalk ash and albarium, step is:
The first step, preparation 1000g composite soil, stalk ash by mass percentage: albarium: expansive soil (soil sample after the oven dry is crossed the 0.5mm sieve)=10:20:70, take by weighing the dry ground quality 700g of the required improvement soil body, stalk ash 100g, albarium 200g mixes; The analysis result of described stalk ash is, in the mass percent of the oxide that obtains after the analyzing and testing: silica 60%, calcium oxide 24.5%, alumina 4.9%, iron oxide 2%, potassium oxide 4.8%, magnesia 2.9%, sodium oxide molybdena 0.9%; The analysis result of described albarium is, in the mass percent of the oxide that obtains after the analyzing and testing: calcium oxide 55.2%, carbon dioxide 41.2%, silica 1 .2%, alumina 0.1 %, iron oxide 0.8%, magnesia 1.5%.
In second step, determine that according to " highway earthwork test rule " (JTG E-2007) modified compaction test the optimum moisture content of composite soil is 19.7%.
The 3rd step joined 19.7g water in the mixture of the first step, and layering adds water and stirs, and wet vexed 24 hours with plastic membrane sealing at ambient temperature, namely obtained discarded stalk ash and the modified expanded soil of albarium.
The application of gained conditioned soil in construction: the discarded stalk ash of gained and albarium modification earth mixtures laid with bulldozer to form the engineering desired thickness be the surfaction layer of 40cm, through light-duty compactor static pressure → 5 days → vibroroller cmpacting of covered with plastic film sealing maintenance → 6 days → heavy compactor static pressure → essence of plastic sheeting covering curing is flat, composition generation chemical reaction in the soil body of required improvement and discarded stalk ash and the albarium, eliminate or reduce the swell-shrink characteristic of the soil body in the improvement layer, can reach requirement of engineering intensity.
Improved effect: (1) swell-shrink characteristic: the free swell test of doing according to " highway earthwork test rule " (JTG E40-2007), the degree of free swelling of pure expansive soil is 70%, the degree of free swelling of the soil body when mixing 10% stalk ash and 20% albarium after the improvement only is 10%, the requirement of degree of free swelling Fs≤40% of the improvement expansive soil of satisfied " highway subgrade construction technique normalizing " defined; Test according to the expansion overall rate that " highway earthwork test rule " (JTG E40-2007) does, the breathing overall rate of pure expansive soil is 11.9%, the breathing overall rate of the soil body when mixing 10% stalk ash and 15% albarium after the improvement is 0.09%, the requirement of breathing overall rate eps≤0.7% of the improvement expansive soil of satisfied " highway subgrade construction technique normalizing " defined; (2) intensity: the unconfined compression strength test of doing according to " highway earthwork test rule " (JTG E40-2007), the unconfined compression strength of pure expansive soil is 550kPa, the unconfined compression strength of the soil body when mixing 10% stalk ash and 15% albarium after the improvement is 1160.8kPa, and improvement back intensity has improved 111.1%; The drying and watering cycle durability of conditioned soil is reduced to 619.7kPa from 1160.8kPa, has reduced by 46.6%, still is higher than the not intensity 550kPa of conditioned soil.
 
Embodiment 3
With the preparation method of the expansive soil of discarding the improvement of stalk ash and albarium, step is:
The first step, preparation 1000g composite soil, stalk ash by mass percentage: albarium: expansive soil (soil sample after the oven dry is crossed the 0.5mm sieve)=10:10:80, take by weighing the dry ground quality 800g of the required improvement soil body, stalk ash 100g, albarium 100g mixes; The analysis result of described stalk ash is, in the mass percent of the oxide that obtains after the analyzing and testing: silica 60.7%, calcium oxide 23%, alumina 4%, iron oxide 3.3%, potassium oxide 5 %, magnesia 3%, sodium oxide molybdena 1%; The analysis result of described albarium is, in the mass percent of the oxide that obtains after the analyzing and testing: calcium oxide 54.1%, carbon dioxide 40.6%, silica 1 .7%, alumina 1.2%, iron oxide 1.2%, magnesia 1.2%.
In second step, determine that according to " highway earthwork test rule " (JTG E-2007) modified compaction test the optimum moisture content of composite soil is 18.6%.
The 3rd step joined 186g water in the mixture of the first step, and layering adds water and stirs, and wet vexed 24 hours with plastic membrane sealing at ambient temperature, namely obtained discarded stalk ash and the modified expanded soil of albarium.
The application of gained conditioned soil in construction: the discarded stalk ash of gained and albarium modification earth mixtures laid with bulldozer to form the engineering desired thickness be the surfaction layer of 50cm, through light-duty compactor static pressure → 7 days → vibroroller cmpacting of covered with plastic film sealing maintenance → 7 days → heavy compactor static pressure → essence of plastic sheeting covering curing is flat, composition generation chemical reaction in the soil body of required improvement and discarded stalk ash and the albarium, eliminate or reduce the swell-shrink characteristic of the soil body in the improvement layer, can reach requirement of engineering intensity.
Improved effect: (1) swell-shrink characteristic: the free swell test of doing according to " highway earthwork test rule " (JTG E40-2007), the degree of free swelling of pure expansive soil is 70%, the degree of free swelling of the soil body when mixing 10% stalk ash and 10% albarium after the improvement only is 13%, the requirement of degree of free swelling Fs≤40% of the improvement expansive soil of satisfied " highway subgrade construction technique normalizing " defined; Test according to the expansion overall rate that " highway earthwork test rule " (JTG E40-2007) does, the breathing overall rate of pure expansive soil is 11.9%, the breathing overall rate of the soil body when mixing 10% stalk ash and 10% albarium after the improvement is 0.25%, the requirement of breathing overall rate eps≤0.7% of the improvement expansive soil of satisfied " highway subgrade construction technique normalizing " defined; The expansion force of pure expansive soil is 295kPa, and the expansion force of the soil body when mixing 10% stalk ash and 10% albarium after the improvement is 45kPa; (2) intensity: the unconfined compression strength test of doing according to " highway earthwork test rule " (JTG E40-2007), the unconfined compression strength of pure expansive soil is 550kPa, the unconfined compression strength of the soil body when mixing 10% stalk ash and 10% albarium after the improvement is 1139.7kPa, and improvement back intensity has improved 107%; Unconfined compression strength is that 784.7kPa has reduced by 31.1% after 5 drying and watering cycles.
 
Embodiment 4
Utilize the expansive soil of the discarded stalk ash of the usefulness that obtains among the embodiment 1 to 3 and albarium improvement, carry out free swell test and compaction test according to " highway earthwork test rule JTG E40-2007 ", with maximum dry density and the optimum moisture content of the expansive soil after definite improvement.Maximum dry density, the maintenance of optimum moisture content sample were carried out the test of breathing overall rate and unconfined compression strength test according to " highway earthwork test rule JTG E40-2007 " after 7 days.Result of the test is as shown in table 2 below:
The discarded stalk ash of table 2 and albarium improvement expansive soil hit real character and expansion characteristics result of the test
The basic physical index of expansive soil: expansive soil is example with area, Huaiyin, Jiangsu, and degree of free swelling is 70%, strong expansive soil in belonging to, and liquid limit 62%, plastic limit 33%, the natural moisture content 20% of soil hits true property optimum moisture content 16%, maximum dry density 1.71g/cm 3
On the amount basis of invariable, the maximum dry density of mixed soil sample reduces gradually along with the increase of mixing grey rate as can be seen from Table 2, optimum moisture content increase gradually and amplification bigger.This be because the density of stalk ash and albarium all less than expansive soil, and the water content increase mainly is because the reason of stalk ash and albarium suction, and contain silica and calcium oxide in two kinds of discarded objects, calcium oxide can generate calcium hydroxide with the water reaction and generate hydrated calcium silicate and drated calcium aluminate with silica then, these compounds form polymer with the coarse granule gluing of not participating in reaction together and improve coarse grained content, ion-exchange after taking place in expansive soil, can play flocculation, carbonization and cementation, thus make the intensity enhancing of expansive soil and improve durability.From table, can see that degree of free swelling is reduced to 6% from 70% of expansive soil; The 50kPa swell increment is along with the increase breathing overall rate of mixing albarium fades away; Unconfined compression strength is along with the increase of mixing grey rate changes greatly, and with respect to the intensity (550kPa) of plain soil, the intensity maximum of conditioned soil has improved 122%(1221.2kPa); By 5 drying and watering cycle life tests, the reduction of pure soil 87.7%, it is less that the unconfined compression strength of conditioned soil has reduced the pure relatively native range of decrease of 28.2 % ~ 46.6%, the purer soil of durability is good.

Claims (5)

1. with the expansive soil of discarded stalk ash and albarium improvement, it is characterized in that being got by the following steps preparation:
The first step takes by weighing 10% stalk ash by mass percentage, 10% ~ 20% albarium, and the dry ground of 70% ~ 80% the required improvement soil body mixes;
In second step, determine that according to the medium and heavy compaction test of " highway earthwork test rule " (JTG E40-2007) optimum moisture content of composite soil is 18.6% ~ 19.7%;
The 3rd step added water in the composite soil that the first step obtains by the water content of the optimum moisture content of determining, stirred, and sealed plastic film is wet vexed 24 hours at ambient temperature, namely obtains discarded stalk ash and albarium modification soil.
2. usefulness according to claim 1 is discarded the expansive soil of stalk ash and albarium improvement, it is characterized in that, the analysis result of described stalk ash is, in the mass percent of the oxide that obtains after the analyzing and testing: silica 60% ~ 61%, calcium oxide 23% ~ 25%, alumina 4% ~ 5%, iron oxide 2% ~ 3.3%, potassium oxide 3% ~ 5%, magnesia 2% ~ 3%, sodium oxide molybdena 0.9% ~ 1%.
3. usefulness according to claim 1 is discarded the expansive soil of stalk ash and albarium improvement, it is characterized in that, the analysis result of described albarium is, in the mass percent of the oxide that obtains after the analyzing and testing: calcium oxide 54.1% ~ 55.2%, carbon dioxide 40.6 ~ 41.2, silica 1 % ~ 1.7%, alumina 0.1% ~ 1.3%, iron oxide 0.8% ~ 1.2%, magnesia 0.9% ~ 1.5%.
4. with the preparation method of the expansive soil of discarding the improvement of stalk ash and albarium, it is characterized in that may further comprise the steps:
The first step takes by weighing 10% stalk ash by mass percentage, 10% ~ 20% albarium, and the dry ground of 70% ~ 80% the required improvement soil body mixes;
In second step, determine that according to the medium and heavy compaction test of " highway earthwork test rule " (JTG E40-2007) optimum moisture content of composite soil is 18.6% ~ 19.7%;
The 3rd step added water in the composite soil that the first step obtains by the water content of the optimum moisture content of determining, stirred, and sealed plastic film is wet vexed 24 hours at ambient temperature, namely obtains discarded stalk ash and albarium modification soil.
5. the application of expansive soil in construction that improves with discarded stalk ash and albarium, it is characterized in that, be the surfaction layer of 30 ~ 50cm at the working face laying depth with the discarded stalk ash that obtains and albarium improvement expansive soil, through light-duty compactor static pressure → 4 ~ 7 days → vibroroller cmpacting of covered with plastic film sealing maintenance → 5 ~ 7 days → heavy compactor static pressure → essence of plastic sheeting covering curing is flat, can reach requirement of engineering intensity.
CN201310154474.7A 2013-04-28 2013-04-28 Expansive soil improved by waste straw ash and marble ash and preparation method and application thereof in construction Expired - Fee Related CN103233458B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103882855A (en) * 2014-04-14 2014-06-25 长江水利委员会长江科学院 Expansive soil cement modifying and filling construction method
CN107653871A (en) * 2017-08-22 2018-02-02 河海大学 A kind of expansive soil foundation improved with shell particles and its construction method
CN108385662A (en) * 2018-01-29 2018-08-10 河海大学 A method of utilizing silicon ash stabilized expansive soil property

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2189382C2 (en) * 1998-07-02 2002-09-20 Благотворительный фонд "Возрождение садов на Руси" Moisture-swelling soil conditioner and a method of preparation thereof
JP2004099688A (en) * 2002-09-06 2004-04-02 Maeda Corp Soil improvement method for high moisture soil and soil improver
CN102249581A (en) * 2011-05-17 2011-11-23 河海大学 Method for improving expansive soil by carbide slag and construction method
JP2011256324A (en) * 2010-06-11 2011-12-22 Sumitomo Osaka Cement Co Ltd Additive for cement-based setting material, and method for remedying volcanic ashy soil using the same
CN102352622A (en) * 2011-07-25 2012-02-15 河海大学 Method for improving swelling soil by using alkali residue and construction method for alkali- residue-modified soil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2189382C2 (en) * 1998-07-02 2002-09-20 Благотворительный фонд "Возрождение садов на Руси" Moisture-swelling soil conditioner and a method of preparation thereof
JP2004099688A (en) * 2002-09-06 2004-04-02 Maeda Corp Soil improvement method for high moisture soil and soil improver
JP2011256324A (en) * 2010-06-11 2011-12-22 Sumitomo Osaka Cement Co Ltd Additive for cement-based setting material, and method for remedying volcanic ashy soil using the same
CN102249581A (en) * 2011-05-17 2011-11-23 河海大学 Method for improving expansive soil by carbide slag and construction method
CN102352622A (en) * 2011-07-25 2012-02-15 河海大学 Method for improving swelling soil by using alkali residue and construction method for alkali- residue-modified soil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王保田: "《改良膨胀土筑堤技术研究》", 《岩土力学》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103882855A (en) * 2014-04-14 2014-06-25 长江水利委员会长江科学院 Expansive soil cement modifying and filling construction method
CN103882855B (en) * 2014-04-14 2016-01-13 长江水利委员会长江科学院 Expansive soil modified cement and filling construction method
CN107653871A (en) * 2017-08-22 2018-02-02 河海大学 A kind of expansive soil foundation improved with shell particles and its construction method
CN108385662A (en) * 2018-01-29 2018-08-10 河海大学 A method of utilizing silicon ash stabilized expansive soil property

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